<template>
    <div class="icons">
      <swiper :options="swiperOption">
        <swiper-slide v-for="(page,index) in pages" :key="index">
          <div class="icon" v-for="item in page" :key="item.id">
           <div class="icon-img">
             <img class="icon-img-content" :src="item.imgUrl"/>
             <p class="icon-desc">{{item.desc}}</p>
           </div>
          </div>
        </swiper-slide>
      </swiper>
    </div>
</template>
<script>
export default {
  name: 'HomeIcons',
  data() {
    return {
      swiperOption: {
        autoPlay: false
      },
    }
  },
  props: {
    list: Array
  },
  computed: {
//    这是一个很棒的算法，将iconList中的数组，拆成二维数组来显示页面,二维数组中每个数组的长度是8
    pages: function() {
      const pages = []
      this.list.forEach((item,index) => {
        const page = Math.floor(index/8)
        if(!pages[page]) {
          pages[page] = []
        }
        pages[page].push(item)
      });
      return pages
    }
  }
}
</script>
<style type="text/stylus" lang="stylus" scoped>
  @import "~styles/varibles.styl"
  @import "~styles/mixins.styl"
  .icons
    overflow: hidden
    height: 0
    padding-bottom: 50%
    .icon
      position: relative
      overflow: hidden
      float: left
      width: 25%
      height: 0
      padding-bottom: 25%
      .icon-img
        box-sizing: border-box
        padding: .1rem
        position: absolute
        left: 0
        right: 0
        top: 0
        bottom: .44rem
        .icon-img-content
          display: block
          margin: 0 auto
          height: 100%
      .icon-desc
        left: 10
        right: 0
        top: 0
        bottom: .44rem
        height: .44rem
        line-height: .44rem
        color: $darkTextColor
        text-align: center
        ellipsis()
</style>
